Sorry... should have mentioned it is a 2007 SR5.
Crutchfield says that a round pair of 6.5 inchers will fit, with their included bracket.
http://www.crutchfield.com/S-nP64iEeBYgR/cgi-bin/prodview.asp?i=130TSA1682&s=0&cc=01
The speaker covers LOOK like they can just pop off easily, but I am...
...considering a pair of 4 ways for the front 2 speakers as the stock pair lack midrange and high end.
Is this a difficult DIY? Does the entire door panel come off or just the speaker cover itself?
Thanks in advance for any advice or info.
Cheers!